Stop device for lathes



LE ROY KRAMER ET AL STOP DEVICE FOR LATHES Sept. 4, 1923.

Original Filgd Feb. 28, 1918 2 Shee fs-Sh eet 1 V flieacanaier 5007726,

Sept. 4,1923. 1,4671% LE ROY KRAMER ET AL STOP DEVICE FOR LATHES Original Filed Feb. 28, 1918 2 Sheets-Sheet 2 E7 mm g 65 6].

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' cross 'slide and carriage, the

Patented Sept. 4, 1923. 7'

UN Teo STATES LE noY KRAMER, OETOLEDO, OI-I IO,ANDlALEXANDEK BOOMEg0F CHICAGOQILLINOIS, I

s'ror nnvrcn non LArnns.

' Original application filed February 28, 1918, Serial. No. 219,551; New Patent. No.1,394,628, '(laited October 25, 192L- Divided and this application filed May 5,1520. v Serial No, 378,981. 7

To all whom it may concern: V

Be it known thatwe, Ln ROY KRAMER and ALEXANDER BOOME, citizens of the United States, residing, respectively, at Toledo, Ohio and Chicago, Illinois, have invented certain new anduseful Improvements in a Stop Device for Lathes, of which the fol lowing is a specification. v t

This invention relates to lathe tool holders and contemplates particularly a stop 1 device attached thereto whereby to arrest the forward-movementof a lathe crosssli'de. at a predetermined point with relation 'to the lathe carriage, this application being a division of our copending application Serial No. 219,551,, 'Feb. 28 1918; nowPatent No. 1,394,628 dated Oct. 25,1921. fThe primary objectof the invention is to provide means inthe form of a novel fldiameter stop designedto limit the travel of the cutting tools as they are presented to the work, and thus insure an accurate final positioning of the tools for action on the work in accordance with the predetermined diam eter to be imparted thereto.

Another object is to provide means with which a fine adjustment of the final position of the tools mayreadily be. made.

A furtherobject is the provision of means whereby the stop vdeviceis easily thrown out of functioning engagement in case for any reason it should become desirable to further reduce the diameter of the Work" a small amount by advancing the cutting tools slightly past the arbitrary limitlset 'by the stop device r Additional objects invention will appear as the nature thereof is clearly set forth and illustrated int-he following detailed description andv drawings. It should be understood however that the above mentioned description and drawings are-designed to illustrate the principle of the invention'and 1 not unnecessarily limit the scope of the appended claims,

In the drawin'gs. g, T Fig. 1 is aside elevationof-a tool holder constructed in accordance with the present invention,parts being slightly broken away; Fig: 2 is an end view of the tool block, latter being slightly broken awiayjand i 7 Fig. 3 is a top planiview of the'carria'ge.

Referring now in; detail to the ,accom 7 panying drawings, .thejnirmeralfllO desig- [chine and on which the wear'strips 15 and and advantages. of the nates the carriage'ofa metal turning lathe, I I

which carriage partake's generally of the construction of carriages usually found in such machines. In order to adapt'the same, however, to the peculiar needs which ar se in connection with the turningfojf caraxles it is necessary'to impartjto the carriage a :lel laterally projecting webs 11' and 12, 31-

ranged, respectively, atthe front and-rear ends or" the carriage 150,-said'webs being pro Vldfi'd with guide grooves 18 and 14, 'res'pec} tively, the 'lsidefs of which are arranged in divergent relation; Wear strips 15 and ltl,

respectively, are applied to the sides of said i I grooves 13 and 14, andby referring to Fig} ure 3 it will be observed that the guide grooves 13 and 14' extend throughout theentire width of the carriage 10 and receive slideways 17 carried by the bed'of the nia- 16 work." One of-these slideways is illustrated, in dotted linesin Figure 1,, it being unnecessary to illustrate further partsof the I 7 machine bed. p v i At the underside of the body 10 is aide- I .pending apron 18 for supporting the. feed f The upper side of the bed- 10 is'pro'vided with longitudinally -extending marginal. up- I wardly-directed flanges 19 and20to which areapplied retaining strips 21 and. 22, respectively, said strips 21 and 22'being, of greater width than the width of the flanges 19-and 20, and; thereby overhanging the in- 7 er edges" of said flanges. Thisprovides guides for the cross slide, tobe hereinafter described, and thus insures proper rno'vei ment of the slide as it traversesthe' carriage 10-. The strip 21is held in ,po'sitionronthe flange l9 bye-plurality of cap-screws 23,, which screws arethreaded into'said flange 19, While the strip 22 is "likewise held in position onthe flange 20 by a pluralityhof Cap screws 24; These Screws 24: take int I i' the body of the carriage'lO and pass through slots 25 formed in a gib 26which is arranged atthe inner side of the flange, 20 and interposed between'the-retaining strip 22andthe bodyfof the carriage; 10. The gib} 26 1n'ay be adjusted 'inwardly lby means of a plura'l I ity of screws 27, or their equivalents, to

pensate for any wear which may arise in connection with the movement of the cross slide to be now referred to.

The numeral 28 designates the hereinbet'ore mentioned cross slide having at opposite sides of its base portion outstanding flanges 29 which fit beneath the retaining strips 21 and 22, the cross slide being thus held upon the carriage 10 but adapted to freely move in the guides formed beneath the retaining strips 21 and 22 and between the flanges 19 and 20. Extending lengthwise of the slide 28 is a bore 30 which receives an adjusting'screw 31. At a point intermediate the ends of the bore 30 the latter is enlarged to provide a downwardly opening polygonal pocket or recess 32,

which pocket or recess 32 receives a polygonal nut 33 the bore of which is screwthreaded to lit the threads of the adjusting screw 31. It will thus be apparent that the cross slide may be moved in either direction in the carriage 10. upon proper rotation of the screw 31. The forward end of the adjusting screw 31' is rotatably mounted within a head block or bracket 34 suitably bolted to the forward end of the carriage 10, and said adjusting screwis held against longitudinal movement in said block 34 through the medium of a fixed collar 35, which is carried by the screw 31 and arranged at the inner side of the block 34, and a hand wheel 36, of standard construction, which is arranged at the outer face of said block 34 and suitably secured to said screw 31. Thus, upon suitable operation of the hand wheel 36 the cross, slide is caused to traverse the carriage 10.

The upper portion of the cross slide 28 is enlarged to provide a dished receptacle or pan 37 for receiving the cuttings, but the forward end of said pan 37 is provided with a raised support 38 the surface of which is flattened, and surrounded by a plurality of guide strips 39 which are suitably secured to said support 38. A socket or pocket is thus provided at the support 38 for receiving a tool-supporting block 40. The pocket formed by the guide strips 39 is substantially rectangular in form, and said toolsupporting block 40 is correspondingly shaped and of such dimensions as to snugly fit within the space between the guide strips 39. Thus it will be seen that when the'toolsupporting blocks 40 are placed upon the support 38 and fitted between the guide strips 39, the same will be afforded a firm and stable mounting upon the cross slide 28.

The block 40 is provided with a plurality, preferably two, oftool-receiving openings 41 which extend lengthwise of the block 40, the bottom of each opening 41 beingprovided with a wear strip 42 suitably secured therein, and preferably case hardened to afford the greatest resistance to wear.

Upon the wear strip 42 the tools 43 are mounted, as clearly illustrated in Fig. 2 each of said tools being properly held withinthe openings 41 by means. of a plurality of set screws 44. If it be desired to raise the tools 43 above the wear strip 42 the same may be accomplished by the interposition of shims orspacing strips 45. 1

It is, of course, necessary that when the block 40 is placed upon the tool slide 28 the same shall be held in firm position on the support 38. This is accomplished by two instrumentalities, to wit; a centering pin 46 and an anchoring stud 47. The cen tering pin 46 enters a threaded opening 48 which is formed in the support 38 at the rear end thereof, said pin 46 being received by an opening 49 formed at the rear end of the block 40 and adapted to register with the opening 48. lVhen this registration has been effected the centering pin 46may be passed through'the opening 49 and'screwed into the opening 48, thus serving to hold the tool supporting block 40 in proper position within the space between the strips 39. The relation of the centering pin 46, is, obviously, a removable one with respect to, the cross slide 28 in order to permit removal of the tool supporting block 40 when such is desired. The anchoring post 47 rises upwardly from the forward end of the support 38 and is screw'threadedat its upper end for receiving a fastening nut 50.. At the forward end" of the block 40 is formed a U-shaped socket 51 which receives the anchoring post 47 when the block 40 is placed upon the cross slide 28. WVhen so assembled the upper end of the anchoring post extends above the; top of the tool supporting block 40, the diameter of the fastening nut 50 being sufiicient to overlap the edges of the socket 51, thus permitting, when the fastening nut 50 is properly operated, a binding engagement between the fastening nut and the tool supporting block, and thereby locking the latter on the support 38. V p 7 As has been previously stated, the invention contemplates primarily the provision of means designed to limit the movement of the tools as they are presented to the work and thus insure the accurate position of the tools in accordance with the predetermined diameter to be imparted to the work. The means by which this is accomplished are illustrated clearly in the accompanying drawings. Such means comprise a stop block 61 which is suitably connected to each side of the carriage 10 at predetermined points, so as tov be held in fixed relation to the movement of the cross slide 28. Each. Qt these stop blocks is provided with anjoutstanding foot 62 to which is connected, as by a bolt 63, or its equivalent, a, stop proper 64. The stop proper 64 has a nose 65 which fits within a groove'66' arranged in the contiguous portion of the carriageld, Mounted at each side. or the forward end of the slide 28 is a bracket 67 in which a set screw 68 is threada-hly. mounted, and thus capable of adjustment within saidbracket 67, and said set screw 68 may be heldinthis position or -ferredto.

r 1' r The stop proper-64has a loose pivotal adjustment bymeans of a locking nut 69 associated therewith; It will be understood that the screw {68' is "so adjustedin the. supporting bracket 67 that when the end of said screw contactswith the stop proper 64s the cutting edges of the tools 43 will have approached the axle to the, proper position for insuring the diameter of cutto be imparted to the axle. When these diameters vary'in accordance with .thedifierent diameters of axles, the screws 68 will be set from time to time so as to provide for the presentation 7 of the cutters in the manner above r connection with the bolt' =63,-and if occasion demands the samemay be swung thereon so as to remove the nose ofthe stop proper from the groove 66. When the stop proper is swung in this manner it is removed from the path of forward movement of the setscrew 68, so that the cross slide 28 may be advanced toward the work to a greater ex tent than when the stop proper is in the im; mediate path of the'set screw.

' It will thus be seen that by proper manipulation of the hand wheel 36 the cross slide 28 is advanced to the work, and the tools presented to the. axle for the roughing operation. The set screw 68 of the diameter stop havingjbeen properly adjusted, the forward movement of'the cross slide 28 is arrested by contact of the screw 68with the stopproper 64. The longitudinal feed of the lathe is now thrown in, and when the required length of out has been made such 7 feed is discontinued by the usual mecha- Obviously, therefore,

nism of the lathe. when the advance movement of the tools to the work is checked by the diameter stop. 'hereinbefore described, the cutting tools are in proper position for imparting to the aids or other work a cut in accordance with the predetermined diameter for which the stop device has'beenv adjusted. a

We claim:

-1. In a lathe tool holder, the combination with across slide, of tool-holding means associated with said slide, and means for arresting movement of "the tool-holding means at a predetermined point in the advance'thereof with respect to the work, said cut-limiting means including a stop movable transversely of the line, of advance otthe: tool-holding means and backed up rigidly at a point in alignment with the application 7 of pressure thereto when in its operative position.

ble means for, arresting movementotthe 1,70 point in the advance. thereof with respect. 'to the work, sald cut-limiting, means. ineluding a stop movable transversely of the with acarriage, of a cross slide ;mounted 2. In-a lathe tool"holder,;'the combina- .tion with a cross. slide, wof -,tool-holding-;

means associated with said slide, and varia-" tool-holding .means at a I predetermined line otoadvancefof the tool-holding: means and backed up, rigidly; atapoint in align- -ment withthe application of pressuretliereto when in its operative position.

,, 3. In a lathetool holder, the combination thereon and movable with respectthereto, tool-holding means associated with said slide, a stop associated with said carriage and movable transversely of the linefot .ad-I

van'ce'of the toolrholding means, and means associatedwith said cross slide andrcoopment of the slide at a-predeterminedpoint .inJthe advance thereof with'respecttothe 1 work, said stop-:being backed up rigidly, at a pointfin alignment withtheapplicm. tion of pressure thereto when in its opera tive position. I 17 4. In, a 'lathetool holder-the combination;

with a, carriage, ofa cross'slide mounted thereon and movable withrespect-thereto, tool-holding means associated with said. I

slide, a stop pivotally mounted 011 said carriageto move transversely'of the line of advance ;of the tool-holding means, and v means associated with said cross slide and cooperating with said stop for arresting movement of theslide at a predetermined pointinthe advance thereof with respect" to the work,said stop' being backed up rigidly at apoint in alignment with: the application of pressure thereto when insits, I

operative position. 7 H 5. In a lathe tool holder, the combination with a carriage, of a cross slide mounted thereon and movablewithrespect thereto,

tool-holding means associated withi'said slide, a stop interlocked with'said carriage- T when in itsoperative"position ata fixed .point in the line of advance of the toolholding means and pivotally mounted to move transverselyof said line of'advan ce, 1 "out of its interlocked engagement, and' variable means associated with; said cross Slide and'cooperating with said fixed stop for arresting movement of the slide 'at a pre i determined point in the 'advance- 'thereof with respect to the work. i

V 6. In a lathe tool holder, the combination with a carriage, of across slide mountedz thereon and movable with respect fthereto,

tool-holding means associated Wlth'. said slide, a fixed stop pivotally mounted on s'aid'carriage to move transverselyjofithe line of advance ofthe tool-holding means Q and backed uprigidly at apoint in align-v p ment with the application of pressure there to'when in its operative position, a bracket carried by said slide, and a set screw adjustably mounted in said bracket and adapted to cooperate with said fixed stop for arresting movement of the slide at a predetermined point in the advance thereof with respect to the work. v

7. In a lathe tool holder, the combination with a cross'slide and means for advancing thesame with respect to the work, of toolholdin means associated with said slide and means for arresting movement of the tool-holding means at a predetermined point in the advance thereof with respect to the work, said cut-limiting means including a plurality of stops movable transversely of the line of advance of the toolholding means and disposed on both sides of the slide-advancing means to prevent torsion on the latter in a plane of its advance upon the stops functioning as such. 7

8. In a lathe tool holder, the combination with a cross slide and means for advancing the same with respect to the work, of toolholding means associated with said slide, and means for arresting movement of the tool-holding means at a predetermined point in the advance thereof with respect to the work, said cut limiting means including a plurality of stops movable transversely of the line of advance of the tool-holding means from operative positions wherein they are rigidly backed up and disposed on both sides of the slide-advancing means to prevent torsion on the latter in a plane of its advance upon the stops functioning as such. in

In testimony whereof we have hereunto signed our names in the presence of two subscribing witnesses.

LE ROY KRAMER. lVitnesses for Kramer:

3V. E. BORNHOFT, M. L. DA'NNnLLs.

ALEXANDER BOOME. lVitnesses for Boonie:

Bonner WV. DER'NALD, H. F. SEIDLER. 

